1 /* 2 * Copyright 2001-2016 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the OpenSSL license (the "License"). You may not use 5 * this file except in compliance with the License. You can obtain a copy 6 * in the file LICENSE in the source distribution or at 7 * https://www.openssl.org/source/license.html 8 */ 9 10 #ifndef OSSL_CRYPTO_UI_LOCAL_H 11 # define OSSL_CRYPTO_UI_LOCAL_H 12 13 # include <openssl/ui.h> 14 # include <openssl/crypto.h> 15 16 # ifdef _ 17 # undef _ 18 # endif 19 20 struct ui_method_st { 21 char *name; 22 /* 23 * All the functions return 1 or non-NULL for success and 0 or NULL for 24 * failure 25 */ 26 /* 27 * Open whatever channel for this, be it the console, an X window or 28 * whatever. This function should use the ex_data structure to save 29 * intermediate data. 30 */ 31 int (*ui_open_session) (UI *ui); 32 int (*ui_write_string) (UI *ui, UI_STRING *uis); 33 /* 34 * Flush the output. If a GUI dialog box is used, this function can be 35 * used to actually display it. 36 */ 37 int (*ui_flush) (UI *ui); 38 int (*ui_read_string) (UI *ui, UI_STRING *uis); 39 int (*ui_close_session) (UI *ui); 40 /* 41 * Duplicate the ui_data that often comes alongside a ui_method. This 42 * allows some backends to save away UI information for later use. 43 */ 44 void *(*ui_duplicate_data) (UI *ui, void *ui_data); 45 void (*ui_destroy_data) (UI *ui, void *ui_data); 46 /* 47 * Construct a prompt in a user-defined manner. object_desc is a textual 48 * short description of the object, for example "pass phrase", and 49 * object_name is the name of the object (might be a card name or a file 50 * name. The returned string shall always be allocated on the heap with 51 * OPENSSL_malloc(), and need to be free'd with OPENSSL_free(). 52 */ 53 char *(*ui_construct_prompt) (UI *ui, const char *object_desc, 54 const char *object_name); 55 /* 56 * UI_METHOD specific application data. 57 */ 58 CRYPTO_EX_DATA ex_data; 59 }; 60 61 struct ui_string_st { 62 enum UI_string_types type; /* Input */ 63 const char *out_string; /* Input */ 64 int input_flags; /* Flags from the user */ 65 /* 66 * The following parameters are completely irrelevant for UIT_INFO, and 67 * can therefore be set to 0 or NULL 68 */ 69 char *result_buf; /* Input and Output: If not NULL, 70 * user-defined with size in result_maxsize. 71 * Otherwise, it may be allocated by the UI 72 * routine, meaning result_minsize is going 73 * to be overwritten. */ 74 size_t result_len; 75 union { 76 struct { 77 int result_minsize; /* Input: minimum required size of the 78 * result. */ 79 int result_maxsize; /* Input: maximum permitted size of the 80 * result */ 81 const char *test_buf; /* Input: test string to verify against */ 82 } string_data; 83 struct { 84 const char *action_desc; /* Input */ 85 const char *ok_chars; /* Input */ 86 const char *cancel_chars; /* Input */ 87 } boolean_data; 88 } _; 89 90 # define OUT_STRING_FREEABLE 0x01 91 int flags; /* flags for internal use */ 92 }; 93 94 struct ui_st { 95 const UI_METHOD *meth; 96 STACK_OF(UI_STRING) *strings; /* We might want to prompt for more than 97 * one thing at a time, and with different 98 * echoing status. */ 99 void *user_data; 100 CRYPTO_EX_DATA ex_data; 101 # define UI_FLAG_REDOABLE 0x0001 102 # define UI_FLAG_DUPL_DATA 0x0002 /* user_data was duplicated */ 103 # define UI_FLAG_PRINT_ERRORS 0x0100 104 int flags; 105 106 CRYPTO_RWLOCK *lock; 107 }; 108 109 #endif 110